<html>
<head>
<script>
function crashme() {
  var obj = document.getElementById('popupid');
  obj.style.visibility='hidden';
}
</script>
</head>
<body onload="crashme();">
<a href="http://www.mozilla.org/">http://www.mozilla.org/</a>

<div id="popupid">
<font>
<script>
  document.write('<form>');
  document.write('<span>');
  document.write('<input>');
  document.write('</span>');
  document.write('<br>');
  document.write('</form>');
</script>
</font>
</div>

</body>
</html>
